Applied AI Engineer (Senior Associate/Manager)

At EY, we develop you with future-focused skills and equip you with world-class experiences. We empower you in a flexible environment, and fuel you and your extraordinary talents in a diverse and inclusive culture of globally connected teams. We work together across our full spectrum of services and skills powered by technology and AI, so that business, people and the planet can thrive together. We’re all in, are you? Join EY and shape your future with confidence.The opportunityEY DnA is the data and advanced analytics capability within EY Asia-Pacific, with over 500 specialist employees working across multiple industry sectors.We implement information-driven strategies, data platforms and advanced data analytics solution systems that help grow, optimize and protect client organizations. We go beyond strategy and provide end to end design, build and implementation of real-life data environments and have some of the best architects, project managers, business analysts, data scientists, big data engineers, developers and consultants in the region.We’re hiring an Applied AI Engineer to own the AI stack end-to-end from the cloud infrastructure it runs on, through the model layer, to the systems and evaluations that keep it working in production. This is a builder role that flexes with the situation: some weeks you’re heads-down shipping as an individual contributor, others you’re setting architectural direction and leading a small team. We want someone who can do both well and read which the moment calls for.You’ll work across the full model landscape. That means getting the most out of frontier APIs (Claude, GPT, and their peers) and deploying, fine-tuning, and operating open-source models when that’s the right call - on cost, latency, control, or privacy. Knowing which to reach for, and why, is a core part of the job.We’re looking for someone who can apply first principles about why a transformer produces the output it does, drive real results out of frontier models, run open source models in production, and design the cloud infrastructure to serve them reliably and cost-effectively at scale.Your key responsibilitiesOwn the architecture of production AI systems — inference stacks, fine-tuning pipelines, retrieval and evaluation infrastructure, monitoring Build on frontier models (Claude, GPT, and peers) with real rigor: tool use, structured outputs, context and cost management, evals, and guardrails — not just prompt-and prayDeploy and operate open-source models (Llama, Qwen, Mistral, DeepSeek, and whatever comes next) on our cloud environment — including quantization, serving frameworks (vLLM, TGI, SGLang, TensorRT-LLM), and multi-GPU inference.Make the frontier-vs-open-source call deliberately, on cost, latency, control, and data sensitivity grounds — and be able to defend itDesign the cloud infrastructure underneath it all: GPU orchestration, autoscaling, cost controls, VPC/networking, IAM, observability. This is not a “hand it to DevOps” roleFine-tune, distill, and evaluate models against real task metrics — not vibes, not leaderboards.Track the current research literature (arXiv, major labs, key conferences) and make judgment calls on what’s ready for production versus what’s still noiseDepending on the project, contribute independently as a senior IC or lead and mentor a small team — and switch between the two as neededPartner with product and leadership to translate ambiguous problems into systems that actually shipTo qualify for the role, you must have:Cloud & infrastructure engineering6+ years of software / infrastructure engineering, with deep production experience on at least one major cloud (AWS, GCP, or Azure).Strong command of GPU infrastructure: instance selection, driver / CUDA stack, containerization, Kubernetes or an equivalent orchestrator, autoscaling patterns for inference workloads.IaC discipline (Terraform / Pulumi / CDK), CI/CD, monitoring (Prometheus / Grafana / OpenTelemetry), and cost management as second nature.Fluent in Python; comfortable in at least one systems-adjacent language (Go, Rust, C++) for the parts that need it. ML / AI depthGenuine understanding of transformer internals: attention (including variants like MQA, GQA, sliding-window, and flash attention), positional encodings (RoPE, ALiBi), tokenization, KV cache mechanics, sampling, and where each part contributes to latency, memory, and qualityProven ability to get production-grade results from frontier models — Claude, GPT, and peers — including tool use / function calling, structured outputs, retrieval, context and cost management, and building the evals and guardrails around them.Hands-on experience fine-tuning open-source LLMs — full fine-tuning, LoRA / QLoRA, preference optimization (DPO / ORPO / equivalents) — and knowing when each is appropriate.Practical familiarity with the modern training and inference stack: PyTorch, Hugging Face, DeepSpeed or FSDP, vLLM or equivalent, evaluation frameworksAbility to read a recent paper, explain what’s actually new, and give an honest assessment of whether it’s worth integrating.Track record of taking models — frontier or open weights — into a production system that real users depend on, with the evaluation, guardrails, and monitoring to match.What we look for:Strong understanding of the mechanics before reaching for an abstraction.Able to contribute as an individual contributor, adapting to the needs of the situationCommunicate tradeoffs clearly to non-technical stakeholders\Highly motivated individuals with excellent problem-solving skills and the ability to prioritize shifting workloads in a rapidly changing industry.An effective communicator, you’ll be a confident leader equipped with strong people management skills and a genuine passion to make things happen in a dynamic organization.What we offerEY offers a competitive remuneration package commensurate with your work experience where you’ll be rewarded for your individual and team performance. We are committed to being an inclusive employer and are happy to consider flexible working arrangements, where this may be needed, guided by our FWA Policy.Plus, we offer:Continuous learning: You’ll develop the mindset and skills to navigate whatever comes next.Success as defined by you: We’ll provide the tools and flexibility, so you can make a meaningful impact, your way.Transformative leadership: We’ll give you the insights, coaching and confidence to be the leader the world needs.Diverse and inclusive culture: You’ll be embraced for who you are and empowered to use your voice to help others find theirs.If you can demonstrate that you meet the criteria above, apply today!